Check out example codes for "rails command line". It will help you in understanding the concepts better.
Code Example 1
rails new app_name #creates a new rails application rails server or rails s #runs the rails server rails generate or rails g #gives a list of available generators rails console or rails c #opens up the rails console that allows you # to interact with your rails application rails destroy or rails d #allows you to destroy what was previously created # ex: rails g model Oops - creates # ex: rails d model Oops - deletes what was created rails about #gives info about your ruby application including the version, etc. rails -T #opens up the rails tasks list to give you info on what you can run. rails db: #most common command, allows you to run create or migrate #ex: rails db:migrate - runs the migration #ex: rails db:seed - seeds your DB from what was added in your seed file
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